bandpass subs sharing juice?

so a few days ago i blew the inline fuse for my power wire and since no one had an 80 amp fuse to replace it with i just bought a new amp wiring kit (it was old anyway). I also figured since i was doing this, i'll bridge the two channels on my amp to one of my subs (i have 2 in a bandpass) so one would get a more SUV suitable 440 watts instead of both getting a wussy 145. I hooked everything up and turned on the truck and, what? both subs still firing! I'm not complaining, but i don't know why both are still firing. (the speaker wire for the other sub isn't hooked up to the amp at all). are subs in bandpass boxes wired together or something? I didn't have this box built, someone gave it to me for free.

uhh.. no they arent connected. the other sub is reflexing...passive radiating. you say you have a bandpass box right? immense pressures are being applied to both woofers. the unconnected woofer is just reflexing

uhh.. no they arent connected. the other sub is reflexing...passive radiating. you say you have a bandpass box right? immense pressures are being applied to both woofers. the unconnected woofer is just reflexing
interesting

Its a concept bein used by quite a few companys now, theres companies selling purpose built passive radiators.

http://www.bostonacoustics.com/car/car_product.aspx?category_id=17&family_id=108

http://www.diysubwoofers.org/prd/

Infinity's powered setups like the basslink, use the same concept. Its supposed to give you around 3db gain.

a passive radiator is a VERY old concept ...... just be careful, bandpass boxes are very picky about sizes and ports. You may be damaging the other speaker too.

a passive radiator is a VERY old concept ...... just be careful, bandpass boxes are very picky about sizes and ports. You may be damaging the other speaker too.
It's cool, i plan on upgrading to a single 12 in a month or so anyway, bandpass takes a lot of space.